1. The first step in the scientific method is usually

    forming a hypothesis

    testing a hypothesis

    making an observation

    collecting data

2. Scientists test a hypothesis by

    formulating questions

    doing experiments.

    designing models

    drawing conclusions.

3. A series of logical steps that is followed in order to solve a problem is called the

    experimental process

    scientific method.

    scientific theory

    model method.

4. What does it mean to say that "no experiment is a failure"?

    All experiments are observations of real events.

    All experiments yield the desired results.

    All experiments give scientists work to do

    All experiments involve manipulating variables

5. For a scientific theory to be valid, it must allow you to

    perform experiments.

    find a new, more complex explanation.

    obtain new results each time

    make predictions.

6. A scientific model is a

    representation of a real event or object.

    small building used to conduct experiments.

    mathematical statement of a theory.

    new theory that takes the place of an incorrect one.

7. What is a scientific law?

    It is the same as a hypothesis.

    It is a description of a natural event

    It is an explanation of a scientific observation

    It is the conclusion of a scientific experiment.

8. Which question cannot be answered by an experiment?

    Does penicillin kill Salmonella bacteria?

    Is rabies caused by a virus?

    Did a comet impact kill the dinosaurs?

    Can radiation cause cancer?

9. The SI unit for measuring temperature is the

    degree.

    mole.

    kelvin.

    ampere.

10. The force with which gravity pulls on a quantity of matter is referred to as

    mass

    volume

    length.

    weight.

11. The decimal equivalent of 10-2 is

    100

    0.1

    0.01

    10

12. What is 78,900,000,000 expressed in scientific notation?

    789 × 109

    7.89 × 1010

    7.89 × 109

    7.89 × 1011

13. The most abundant gas in the atmosphere is ____________________.

14. A measurement that is accurate is one that

    is as exact as possible.

    is close to the true value.

    contains at least four significant figures.

    contains five decimal places.